Teacher Work

Science Lab Sample

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Frost Action Lab

Sheri Edwards

Frost Action

Grade 8

5/2/01

Research
Question

What effect does freezing
temperatures have on water?

Hypothesis

The water bottle will expand and
the lid will pop off.

Method

Completely fill a plastic bottle
with water, getting all the air out and capping the bottle
tightly. Place the bottle in a plastic bag. Put the bag and bottle
into a freezer over night.

Observation

The next day the bottle had
bulged out on one side.

Conclusions

The freezing temperatures turned
the water from a liquid into a solid. When water turned to a
solid, it expanded and took up more space so the plastic bottle
had to bulge. The hypothesis was correct, although the cap did not
pop off. The experiment could be done again, this time making sure
all the air is out of the bottle.

Application

In the real world, water gets
into pavement. The water freezes and expands, breaking the
pavement and creating potholes. To prevent this, perhaps the top
of the roads could be made smoother with less holes so less water
would get in. Keep heavier vehicles on special roads, not on
regular streets. Put drains a system of capilary drainage tubes to
collect and drain the water. Put protective coats on roads to keep
water out. Put a heating system in the roads.